<html> 
<head> 
<title>JS get MAC</title> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<meta name="generator" content="editplus" /> 
<script event="OnObjectReady(objObject,objAsyncContext)" for="foo">  
if(objObject.IPEnabled!=null&&objObject.IPEnabled!="undefined"&&objObject.IPEnabled == true){  
   if(objObject.MACAddress!=null&&objObject.MACAddress!="undefined"&&objObject.DNSServerSearchOrder!=null)  
       MACAddr=objObject.MACAddress;  
   if(objObject.IPEnabled&&objObject.IPAddress(0)!=null&&objObject.IPAddress(0)!="undefined"&&objObject.DNSServerSearchOrder!=null)  
       IPAddr=objObject.IPAddress(0);  
   if(objObject.DNSHostName!=null&&objObject.DNSHostName!="undefined")  
       sDNSName=objObject.DNSHostName;  
}  
</script> 
<script type="text/javascript"> 
var MACAddr; 
var IPAddr; 
var DomainAddr;  
var sDNSName;  
function init(){ 
   var service=locator.ConnectServer(); 
   service.Security_.ImpersonationLevel=3; 
   service.InstancesOfAsync(foo,'Win32_NetworkAdapterConfiguration'); 
} 
function getMac(){ 
   document.getElementById('txtMac').value=unescape(MACAddr); 
} 
</script> 
</head> 
<body onLoad="init()"> 
<object id="locator" classid="CLSID:76A64158-CB41-11D1-8B02-00600806D9B6" VIEWASTEXT></object>  
<object id="foo" classid="CLSID:75718C9A-F029-11d1-A1AC-00C04FB6C223"></object>  
<input type="text" id="txtMac" /> 
<input type="button" id="btn" value="Mac" onClick="getMac()" /> 
</body> 
</html>